| BTBeco Tek Mfg INC | Lorain | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| BSBelmont Solids Control | Campbell | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| CSCalmego Specialized Products, LLC | Greenville | OH | Primary Metal Manufacturing331521 | 1-19 | ◇ UNVERIFIED |
| CMCarbide Metals INC | Youngstown | OH | Primary Metal Manufacturing331410 | — | ◇ UNVERIFIED |
| CTCast-fab Technologies, INC. | Cincinnati | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| CACentral Aluminum Company | Columbus | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| CACertified Alloys INC | Maple Heights | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| CSCharter Steel Cleveland INC (1318007658) | Cleveland | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| CSColumbus Steel Castings | Columbus | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| CWCostco Wholesale | Columbus | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| DEDefiance Energy | Defiance | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| EGEsab Group INC | Ashtabula | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| FCFlowserve Corporation * | Dayton | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| FFFoote Foundry CO. INC. (0142000119) | Fredericktown | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| FFFunk Finecast INC | Columbus | OH | Primary Metal Manufacturing331512 | — | ◇ UNVERIFIED |
| GAGarfield Alloys INC | Garfield Heights | OH | Primary Metal Manufacturing331528 | — | ◇ UNVERIFIED |
| GDGe Dover Products Plant | Dover | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| GCGeneral Casting CO Poulton Div | Columbus | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| GEGeneral Electric, Tungsten Products Plant | Euclid | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
 Golden Aluminum Extrusions Warren, LLC | Warren | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| GEGould Electronics INC. | Mc Connelsville | OH | Primary Metal Manufacturing331421 | — | ◇ UNVERIFIED |
| GLGreene Lyon Metals LLC | Jackson | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| GSG & S Titanium INC | Wooster | OH | Primary Metal Manufacturing331491 | — | ◇ UNVERIFIED |
| HMHarry Masser CO INC | Columbus | OH | Primary Metal Manufacturing331318 | — | ◇ UNVERIFIED |
| IAIndalex Aluminum Solutions-girard Plant (0278020021) | Girard | OH | Primary Metal Manufacturing331316 | — | ◇ UNVERIFIED |
| IIIntermet Ironton Foundry | Ironton | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| KSKilroy Structural Steel CO | Cleveland | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| KCKindt-collins CO | Cleveland | OH | Primary Metal Manufacturing331521 | — | ◇ UNVERIFIED |
| KFKnapp Foundry Company INC (1677010014) | Akron | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| KIKoncor Industries | Wauseon | OH | Primary Metal Manufacturing331222 | — | ◇ UNVERIFIED |
| LLL & L Scrap Metals & Recycling | Gallipolis | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| MFMansfield Foundry Corporation | Mansfield | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| MGMark Gray Enterprises | Columbus | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| MDMidwest Dicken Fndy | Arcadia | OH | Primary Metal Manufacturing331525 | — | ◇ UNVERIFIED |
| NMNational Metal Abrasive Company | Wadsworth | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| NBNew Boston Coke CORP | New Boston | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| OCOhio Cold Rolling Company LLC | Yorkville | OH | Primary Metal Manufacturing331110 | — | ◇ UNVERIFIED |
| ODOhio Decorative Products LLC | Spencerville | OH | Primary Metal Manufacturing331522 | — | ◇ UNVERIFIED |
| OPOhio Precious Metals LLC | Jackson | OH | Primary Metal Manufacturing331000 | — | ◇ UNVERIFIED |
| OVOhio Valley Aluminum C LLC Niles Facilit | Niles | OH | Primary Metal Manufacturing331314 | — | ◇ UNVERIFIED |
| ODOmni Die Casting INC | Massillon | OH | Primary Metal Manufacturing331521 | 20-99 | ◇ UNVERIFIED |
| OOOmni Oxide CORP Ohio Oxide Div | Lancaster | OH | Primary Metal Manufacturing331492 | — | ◇ UNVERIFIED |
| ODOmnisource Defiance | Defiance | OH | Primary Metal Manufacturing331111 | — | ◇ UNVERIFIED |
| OAOrmet Aluminum Mill Products CORP | Hannibal | OH | Primary Metal Manufacturing331315 | — | ◇ UNVERIFIED |
| OPOrmet Primary Aluminum CORP | Hannibal | OH | Primary Metal Manufacturing331312 | — | ◇ UNVERIFIED |
| PGParker Gear Pump Division | Youngstown | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| PAPrecision Aluminum INC. | Wadsworth | OH | Primary Metal Manufacturing331524 | — | ◇ UNVERIFIED |
| PCPride Cast Metals | Cincinnati | OH | Primary Metal Manufacturing331513 | — | ◇ UNVERIFIED |
| QCQuincy Castings, INC. | Quincy | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
| RMRainbow Muffler & Brake | Sandusky | OH | Primary Metal Manufacturing331511 | — | ◇ UNVERIFIED |
